Audi A6 Car for Sale, Audi A6 car for sale. Metallic Blue, Navy. S-line special edition. Full Service History, 49,400 mileage. MOT until April 216, Taxed until March 2016. 1 owner, unfortunate sale due to company car. 4 years old.Excellent condition, full leather interior.19" alloys., Rotherham,.